28385043171 has 16 divisors (see below), whose sum is σ = 37904217120. Its totient is φ = 18894643200.

The previous prime is 28385043163. The next prime is 28385043233. The reversal of 28385043171 is 17134058382.

It is not a de Polignac number, because 28385043171 - 2³ = 28385043163 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28385043101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7726191 + ... + 7729863.

It is an arithmetic number, because the mean of its divisors is an integer number (2369013570).

Almost surely, 2^28385043171 is an apocalyptic number.

28385043171 is a deficient number, since it is larger than the sum of its proper divisors (9519173949).

28385043171 is a wasteful number, since it uses less digits than its factorization.

28385043171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6886.

The product of its (nonzero) digits is 161280, while the sum is 42.

The spelling of 28385043171 in words is "twenty-eight billion, three hundred eighty-five million, forty-three thousand, one hundred seventy-one".